Vertical fire tube boiler



June 30, 1931. C, s, CHRlsMAN 1,812,513

VERTICAL FIRE TUBE BOILER Filed Dec. lO, 1926 4 Sheets-Sheet l June 30, 1931. c. s. cHRlsMAN v 1,812,513

VERTICAL FIRE TUBE BoILER Filed Dec. l0, 1926 4 Sheets-Sheet 2 June 30, 1931. c. s. cHRlsMAN 1,812,513

VERTICAL FIRE TUBE BOILER Filed Dec. l0, 1926 4 Sheets-Sheet 3 June 3o, 1931. C S,CHR,SMAN 1,812,513

VERTICAL FIRE TUBE BOILER Filed Dec. 10, `1926 4 Sheets-Sheet 4 Cwmfw G12/MM 4.

Patented June 30, 1931 STA-res PATENT orrlca S.- carisma or was@ PaNNsYLveNIa. Assieme To THE U- .e 1,.

' BELAWME vertices Ha TUBE ,Home

Application filed December 10, 1926. Serial Non. 145x154.

v Objects of the presentl invention are to provide a vertical tire .tube boiler adapted not only for .direct firing but also for use as a waste heat boiler; to increasethe rapidity of circulation of water in the boiler while securing to a large .extent counterfliow of the Water .and heating gases increasing thereby the efficiency Lof heatrtnansfer; to eliminate the necessity of a-Msepa'rate steam drum and its water and steam connections; .to complete/.the combustion .oit the heating gases, when necessary, and .to reduce ythe tempera.` tune-.of the .gases A.before their impingement uponV the `lower tuibesheet; to avoid danger r of burning .the tube-sheets; to recover heat alternately from gases 4of .different types as from a vwaste gas and .a gas other .than waste tofin'thelease of gases `of a carbureted water gas set, efficiently recover heat in the waste h'las'tk gases `and to recover a considerable portion' of the heat in the carbureted Water gas without .passing the carbureted Water gas` throughthe tubes, thus obviating `fouling them -by tar; to reducetheltemperature of .can

bureted water ga-s aslow as .possible without deposition ef tar before it neacwhes valves and other vparts. of apparatus to which it is delivered for condensing; and to minimize the danger of dust and other impurities being carried up through the tubes.

Other objects of the invention will appear from the following description at the end of which the invention will be claimed.

The invention may be said to comprise a y vertical fire tube boiler provide-d at the top with ay feed water inlet and having a. cylindrical Wall arranged in the water space and spaced from the boiler shell to provide an annular space, said annular space accommodating the upward peripheral flow of hot Water, a boiler setting spaced from the boil* er shell and providing a chamber, and means for passing hot gases down through the chamber and up through the tubes in counterlow relation with the water, with or without means for passing other hot gases down through the chamber in counteriiow relation with the Water in said annular space and bypassing the tubes out of said chamber.

The invention also comprises the improvements to be presently described and finally claimed.

In Zthe following description reference Will be made to the accompanying drawings forming part hereof and in which y Figure 1 is an elevational view in section of a vertical fire tube boiler embodying -features of the invention and arranged" for operation with gases of two kinds or '.Acharacter.

Fig. 2 is a transverse sectional view taken on the line 2--2 of Fig. 1. v

Fig. 3 is an elevational view, partly in sec. tion, illustrating a modification .of the invention showing the boiler arranged for opera.- tion withone kind of hot gas and direct firing.

Fig. 4 is an elevational view, partly 1n section, illustrating a modification in which two of the boilers -are associated the -`setting.

Fig. 5 is a horizontal .sectional View taken on the line 5 5 .of Fig. ,4, and A Fig. 6 is a transverse sectional view taken on they line 46--6 of Fig. 4. y

'Referring more particularly to Fig. 1, the vertical fire tube boiler is shown as provided with top and bottom tube sheets 1 and 2 associated with the fire tubes 3. At the top there is a feed water inlet 4 shew-n to include a. feed Water heating coil 5 and extending axially into lthe boiler to substantially the Watenlevel. 6 is a cylindrical wall arranged in the boiler between its shell andi-tubes and spaced from the boiler shell .to provide an annular space '7. The V*wall f6 extends from substantially the water' level to ya point above the lower tube sheet2. The annular space 7 accommodates the upward peripheral ilow of hoty water. 8 is a boiler setting spaced from the :boiler shell and it .provides a chamber 9 around the Water space of the vboiler and the lower .tube sheet 21 'There are means i'or .passing hot gas down through the chamber`9 and up through the tubes counterflow relation with the water. rlhe construction illustrated in Fig. l is adapted for use at Adifferent .times with two kinds of gases,' Jfor instance blast `gas and .carbureted Water gas from a carbureted water gas set, vand in that case the hot Kga-s, either :blast gas or carbureted Water gag, is et rvl() and descendsthrough the chamber 9, as indicated by both the dotted line arrows and the full line arrows. In the case of the blast vgasI it indicated bythe dotted 'linearrows, and

forY this purpose the valve 12 is closed and the valveV 11 is open. In the particular ap- Y aoplication of the invention yunder discussion,

it. is an advantage tohave the carbureted f.

water gas by-passthe tubes because if it passesthrough the .tubes there Ais danger of deposition of tar on the surface'of the tubes whichreceiving .dust from the subsequent passage of Vblast gas produces an 'objection- Inasmuch as the able 'coating or deposit. direction Vof lowfof, the gas that passes through the-tubes is changed at-the bottom ofthe boiler, there, is a tendency for dust to fallV out ofthe gas, v'and thefhopper 1?.at

the base -of the settingi'may well be provided for th'erec-eption and removalV of such dust. The lining of the .setting forms a contraction or throat as at 14 whichoperatesto impart a swirling motion to the gases as they de'- scend through the chamber 9. 15 is a ring or collar,shown as-coriugat-ed, aty the top of the chamber 9, and it serves to protect the shell of the boiler from erosion by vtheentering gas or, perhaps more accurately, by dust carried along with the gas. 16 isa steamv'oiftake from the boiler. 17 is a mud drum arranged outside of the boiler setting vand connected by a pipe 18 with' the water spacel of the boiler and 'provided with a blow off fitting 19. y2O, Figs: 1 and 2,' are jet'tubes arrangedto discharge tangentially'into the lower part of the Vwater :space of the boiler to insure the movementof mud tothe pipev 18. The open ended tube 21 around which ithe feed water heater coil 5 iswound serves to deflect theV gas in itstravel through the chamber 22 o-f the feedwater heater 'in the' manner indicated by the full line arrows, thus providing a counterflowy between the 4.feed water andthe gas in the feed water heater.

The construction 'and mode of operation of. the modification of the invention illustrated in'Fig. 3 are as has been described with the exception that the setting'23 is modified .to

provide a combustion'chamber'24 from which hot gases or products enter theannular chamber 9a by way ofV the opening 25. In this modification the dicated by vfull line arrows.

The const ruction andv mode ofoperation of*A the modification illustrated in Figs. 4 to 6 are as has been described except as follows: 'Iwo boilers 26 and.27each of the'typeillu'strated inv Fig. 1 and above fully described are I mounted in asingle settingi28, and these boill passage of the hot gas is iners have gas and steam offtakes 30 in common. In order to circulate the gas in the chambers 9C there is shown a baffle 31, and it may be remarked that the gas entering at 32 and through the feed water heater and out at `the oiftake 29. ,The valve 34 is closed. Car- Y 'buret'ed water gas follows the same path but vley-passes the boiler tubes because the valve at 29 is closed and because the valve that controls the outlet 34. is open.

It will be obvious to those skilled inthe art to which the invention relates ythat modificationsmay `be made indetails of construction and arrangement and matters of mere fform without .departing from the spirit of the invention which is notlimited to such matters or otherwise than the prior art and the appended claim may require.

Iclaim:` y i A lire tube boiler, adapted to be heated alternatively byA two kinds Vor gases one of which is linjurious to the tubes of the boiler,

comprising in combination,a verticaly cylin.

drical boiler shell, a boilersetting surrounding said boiler shelll and spaced therefrom to form a gaspassa'ge, a gas inlet to said passage near the top of the setting, a smoke box above the top of said boilershell, a gas chamber below said shell in communication with said gas passage, a plural-ity of vertical fire tubes extending through said shell VVconnecting the smoke box with said gas chamber, means for withdrawing the injurious gas from thegas chamber and offtake means for the other gases from said smoke box. A Y Y' CHARLES SL CHRISMAN. 

